bring back etcd registry

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

ocis-pkg/go.mod

@@ -40,5 +40,9 @@ replace (
 	github.com/owncloud/ocis/accounts => ../accounts
 	github.com/owncloud/ocis/settings => ../settings
 	github.com/owncloud/ocis/storage => ../storage
-	google.golang.org/grpc => google.golang.org/grpc v1.26.0
+	// taken from https://github.com/asim/go-micro/blob/master/plugins/registry/etcd/go.mod#L14-L16
+	go.etcd.io/etcd/api/v3 => go.etcd.io/etcd/api/v3 v3.0.0-20210204162551-dae29bb719dd
+	go.etcd.io/etcd/pkg/v3 => go.etcd.io/etcd/pkg/v3 v3.0.0-20210204162551-dae29bb719dd
+	// latest version compatible with etcd
+	google.golang.org/grpc => google.golang.org/grpc v1.29.1
 )

ocis-pkg/registry/registry.go

@@ -2,8 +2,9 @@ package registry
 
 import (
 	"os"
+	"strings"
 
-	//etcdr "github.com/asim/go-micro/plugins/registry/etcd/v3"
+	etcdr "github.com/asim/go-micro/plugins/registry/etcd/v3"
 	mdnsr "github.com/asim/go-micro/plugins/registry/mdns/v3"
 
 	"github.com/asim/go-micro/v3/registry"
@@ -18,14 +19,14 @@ var (
 // It defaults to mDNS, so mind that systems with mDNS disabled by default (i.e SUSE) will have a hard time
 // and it needs to explicitly use etcd. Os awareness for providing a working registry out of the box should be done.
 func GetRegistry() *registry.Registry {
-	//addresses := strings.Split(os.Getenv(registryAddressEnv), ",")
+	addresses := strings.Split(os.Getenv(registryAddressEnv), ",")
 
 	var r registry.Registry
 	switch os.Getenv(registryEnv) {
-	//case "etcd":
-	//	r = etcdr.NewRegistry(
-	//		registry.Addrs(addresses...),
-	//	)
+	case "etcd":
+		r = etcdr.NewRegistry(
+			registry.Addrs(addresses...),
+		)
 	default:
 		r = mdnsr.NewRegistry()
 	}